M-AUDIO Delta RBUS - Manual (Page 31)

R-BUS’s S/PDIF receiver is capable of recognizing a valid input signal
versus an invalid, corrupt or non-present one. When a valid signal is
detected at S/PDIF In, this group box displays "Valid Input Detected."
When an invalid signal is detected or no signal is present, the group box
displays "Invalid or Not Present." Below this message are two ‘grayed-
out’ buttons: "Coax(RCA)" and "Optical." These are functions of the Delta
DiO 2496, another product in the M Audio Delta line, one with both
optical and coaxial S/PDIF inputs. These controls do not apply to the
Delta R-BUS.
DIGITAL OUTPUT FORMAT
Within the "Digital Output Format" group, you choose the digital audio
format of the S/PDIF output. The default setting, "Consumer," is a true
S/PDIF format and is recognized by all consumer devices. The alternate
"Professional" setting is an AES/EBU type data stream, but electrically
S/PDIF. This is a work-around that is recognized by some but not all
AES/EBU devices.
For both consumer and professional output formats, the "Advanced"
checkbox will allow you to force a few particular status bits in the
outgoing S/PDIF signal. The advanced option is for expert users only;
however, if you decide to go exploring, change a few bit settings and get
lost, you can always select the "Restore Defaults" button to restore the
outgoing status bits to their factory settings. When "Consumer" and
"Advanced" are both selected, the group "Consumer Format Advanced
Settings" will appear. When "Professional" and "Advanced" are both
selected, the group "Professional Format Advanced Settings" will appear.
These groups are described below:
CONSUMER FORMAT ADVANCED SETTINGS (Copy Mode)
Copy protection, also known as Serial Copy Management System (SCMS),
is written into the S/PDIF subcode, a reserved part of the S/PDIF digital
stream that is independent of the actual audio data being transmitted. It
can be used to inhibit the amount of copies that can be made, or allow for
unlimited copying. Three SCMS modes are available. "Original (Copy
Permitted)" indicates that the source material may be copied by a receiving
device. "1st Generation" indicates that the source material is a first
generation copy. Most devices that are capable of recording will reject
material with this SCMS mode set. The final option is "No SCMS" which
may be used to override the other two modes and allow a recording device
to successfully record the audio data. Different manufacturers’ products
may interpret these codes differently and require you to set these bits by
"trial-and-error" until proper operation is achieved.
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